多年来轴承生产厂家一直使用刚玉砂轮磨削淬硬轴承钢零件。尽管用这种砂轮已经制造出数以亿计轴承，但是，由于砂轮磨损迅速，严重地影响了生产率的提高。同时，砂轮的迅速磨损对磨削加工精度和磨削表面质量也产生了极为不利的影响。立方氮化硼（ＣＢＮ）具有硬度高、耐热性和 Bearing manufacturers over the years has been using corundum grinding wheel hardened bearing steel parts. Although hundreds of millions of bearings have been manufactured with this type of grinding wheel, the rapid increase of the wear rate of the grinding wheel severely affects productivity. At the same time, the rapid wear of the grinding wheel has also had an extremely adverse effect on the grinding accuracy and surface finish. Cubic boron nitride (CBN) with high hardness, heat resistance and